Wei-Jen Lee

Wei-Jen Lee
University of Texas at Arlington | UTA · Department of Electrical Engineering

About

395
Publications
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8,260
Citations

Publications

Publications (395)
Article
Battery swapping-charging systems (BSCSs) can provide better battery swapping services for electric vehicles (EVs) in large cities. In BSCSs, EV batteries can be centrally charged at battery charging stations (BCSs) and then dispatched via delivery trucks to battery swapping stations (BSSs) to support local EVs. This paper considers the real-time o...
Article
Full-text available
With the advancement of transportation electrification and Internet of Things (IoT), the cloud based shared on-demand logistic fleet management platforms, such as Lalamove and Gogovan, become more and more popular. Under this setting, the scheduling platform needs to dispatch vehicles while dealing with the increasing charging demands of logistic f...
Article
With the development of DC renewable power generation and DC power consumption, more and more attention has been paied on residential low voltage DC (RLVDC) power system in recent years, because of the advantages on conversion efficiency and control flexibility. Meanwhile, there are still some obstacles and challenges in practical implementation of...
Article
Full-text available
The dynamic line rating (DLR) can be an effective mechanism that reduces wind curtailment induced by line congestion considering its unique correlation to wind speed. However, the calculation of the DLR depends on accurate environmental parameters, which can be challenging in look-ahead decision-making applications. Consequently, transmission line...
Article
Full-text available
The autonomous mobility-on-demand (AMoD) system plays an important role in the urban transportation system. The charging behavior of AMoD fleet becomes a critical link between charging system and transportation system. In this paper, we investigate a strategic charging pricing scheme for charging station operators (CSOs) based on a non-cooperative...
Article
One major reliability concern regarding renewable energy resources connected in the vicinity of series-compensated power transmission lines or to weak power grids is sub-synchronous resonance (SSR). A particular type of interaction known as sub-synchronous control interaction (SSCI), with a purely electrical nature, has the potential to grow very r...
Article
The power system industry often operates close to its limits to accommodate the increased demand, posing a high risk of blackouts. Power system restoration techniques are utilized post-breakout with the focus on load pickup and speedy recovery. In traditional heuristic methods, the load is considered to be constant after it is picked up. However, f...
Article
This paper introduces a new scheme for suburban renewable energies, hydrogen plant, and logistics (SRE-HP-LC) integration scheme and dispatching. The objective of the proposed SRE-HP-LC integration scheme aims at coordinating the operation of renewable energies, hydrogen production and storage and logistic transportation. In order to take advantage...
Article
The autonomous mobility-on-demand (AMoD) system provides an alternative solution for sustainable and economical transportation system. Meanwhile, battery swapping could become a promising approach to sustain the efficient operation of EV fleet. This paper proposes a combined operation scheme for BSS and AMoD system. To maximizing the profit of AMoD...
Article
Full-text available
Due to environmental concerns, renewable energy sources (RESs) gradually replace conventional power generations. In the last decade, wind and solar electricity generation have increased from 55 million MWh to 275 million MWh and from 2 million MWh to 96 Million MWh, respectively, in the US. Recently, FERC Order 2222 allows distributed energy resour...
Article
Accurate model of generating unit plays a key role in power system modeling and simulation. To ensure the safe and stable operation of power grids, North American Electric Reliability Corporation (NERC) requires that all generators larger than 10 MVA have to perform the model verification in every five years. However, the traditional key parameter...
Article
Considering the important role of energy in modern society, it is imperative to study the current situation and future development of energy under the influence of COVID-19. This paper identifies the current research hotspots, proposes future research directions accordingly, and summarizes the methodologies via a bibliometric analysis. Five researc...
Article
Incentive-Based Demand Response (IBDR) was considered as a feasible option to solve the sudden shortage of Distributed Energy Resource (DER) in Microgrid. However, the current IBDR policies and strategies are not directly applicable to residents due to many defects. To this end, a versatile hierarchical IBDR strategy is proposed in this paper. To e...
Article
With the emerging of prosumers in residential level, peer-to-peer (P2P) energy trading provide a novel way to prompt the localized management of distributed energy resources (DERs). However, the work of designing an appropriate market framework, with the fair and flexible pricing strategy for each participant, is still very challenging. This paper...
Article
Accurate equivalent model can be efficiently to analyze the dynamic properties of Active Distribution Network (ADN) as well as assesse their impacts on stabilities of interconnected power system. However, due to stochastic nature of renewable resources and time-varying configurations of load conditions, traditional ADN equivalent model may not robu...
Article
As power distribution systems become increasingly interconnected and concentrated with DER and high potential equipment, effectively avoid the medium-low voltage caused safety risk drawing more attentions. Therefore, the accurate, fast and reliable preemptive arc detection and location method is essentially to be developed. However, due to the issu...
Article
In non-solidly earthed distribution networks, single-phase-to-ground faults (SPGFs) significantly threaten the safety of people and equipment. Although selection and location techniques for the existing fault lines have made remarkable contributions in reducing the damage due to SPGFs, a certain amount of power loss still exists in the SPGF owing t...
Article
This article proposes a novel fault-localization method that is based on the nonintrusive fault-monitoring (NIFM) techniques in high-voltage/extra-high-voltage (HV/EHV) power transmission networks. In this work, the fault signals measured at the utilities are extracted by the hyperbolic S-transform (HST) before going through the identification proc...
Article
Full-text available
With the increasing penetration of renewable energy, power grid operators are observing both fast and large fluctuations in power and voltage profiles on a daily basis. Fast and accurate control actions derived in real time are vital to ensure system security and economics. To this end, solving alternating current (AC) optimal power flow (OPF) with...
Article
The interdependences between electric power systems and transportation systems are becoming increasingly tight as the market share of electric vehicles keeps booming. Therefore, improving the operation performance of power system and transportation system as an integrated system becomes a critical issue. This paper investigates the coordination bet...
Article
This paper proposes a robust distributed secondary control approach for voltage restoration of an islanded microgrid with inverter-based distributed generators (DGs). In the proposed approach, each DG only requires the knowledge of its own and immediate neighboring information and dispenses with the need of complex communication network. Unlike mos...
Article
Full-text available
With the emerging concept of sharing-economy, shared electric vehicles (EVs) are playing a more and more important role in future mobility-on-demand traffic system. This paper considers joint charging scheduling, order dispatching, and vehicle rebalancing for large-scale shared EV fleet operator. To maximize the welfare of fleet operator, we model...
Article
This paper presents a spatial-temporal demand management scheme and cooperative benefit allocation method to optimize the operation of geo-distributed electric vehicle (EV) charging station and EV aggregators. Considering the spatial-temporal characteristics of EV charging demand and energy cost distribution, we first propose a collaborative demand...
Article
The papers in this special issue focus on advanced approaches and applications for electric vehicle charging. Due to the concern of carbon emission, pollution, and oil depletion, transportation electrification has drawn more and more attention in both industrial and academic sectors. As one type of rapidly increasing power demands, electric vehicle...
Article
The Single-phase-to-ground fault (SPGF) affects reliability and security of distribution system greatly. Accurate online recognition of fault causes can help improve the efficiency of weak components finding and maintenance. In this paper, various symptom features of the SPGF by typical causes are analyzed and a fuzzy inference system (FIS) for fau...
Article
Full-text available
Arc flash hazard prediction methods have become more sophisticated because the knowledge about arc flash phenomenon has advanced since the publication of IEEE Std. 1584-2002[17]. The IEEE Std. 1584-2018 [13] has added parameters for more accurate arc flash incident energy, arcing current and protection boundary estimation. The parameters in the upd...
Article
To improve the comprehensive performance of the metro traction power supply system (MTPSS), a new multi-pulse integrated metro traction power supply system (MI-MTPSS) is proposed in this paper. The configuration and characteristics of MI-MTPSS are introduced, and based on the practical bilateral-ring power supply structure, a series of MTPSS-combin...
Article
The existence of wake effect can affect the total power generation of a wind farm. To alleviate the impact of wake effect, numerous algorithms under the paradigm of evolutionary computation have been proposed to find the optimal layout of wind turbines. Previously, inspired by the self-adjustment capability among the individuals of a species in the...
Article
Full-text available
A contactless method based on infrared image matching is presented for zero-value insulator detection on outdoor porcelain insulator string. An improved SIFT (scale-invariant feature transformation) method is developed to extract features and accomplish the pre-matching between the insulator string to be detected and the standard string in the imag...
Article
Regional wind power forecasting is conducive to achieving scientific dispatch of the power system as well as improving its reliability. Data mining based on a large number of samples is an effective way to improve the accuracy of wind power forecasting. A new regional power forecasting method in the context of data mining is presented in this paper...
Preprint
Solving AC optimal power flow (OPF) with operational security constraints remains an important but challenging optimization problem for secure and economic operations of the power grid. With the ever-increasing penetration of renewable energy, fast and large fluctuations in power and voltage profiles are observed on a daily basis; thus, fast and ac...
Article
Due to the geographic features and fruitful water resources, the distributed generation of Small Hydropower Generator Stack (SHGS) are vigorously developed in southwest China. As the more concerns about security and stability of power grids with the large amount of SHGS feed into the grid, the accurate models are critical to analyze those potential...
Article
Due to the maturity of wide area measurement technology, phasor measurement unit (PMU)-based dynamic equivalent modeling method (PDM) has been wildly used in large-scale power system modeling. However, traditional “event-based” PDM equivalent model may face serious robustness issues, such as although derived equivalent models show the good ability...
Article
With more distributed energy resources penetrated into the residential community, nanogrid based peer-to-peer (P2P) energy market has rapidly emerged over recent years. Due to the complexities on the decision-making process of each market participant, an efficient, fair and beneficial oriented bidding strategy is thus necessary. In this article, a...
Article
Full-text available
Unlike short circuit faults in power systems, arcing faults produce intense light during fault events. Light-sensing technology has been under development to detect arc faults since the 1980s. Currently, optical fiber and point sensors are two types of light sensors applied, along with the simultaneous overcurrent mechanism, for arc-flash relays. D...
Article
Full-text available
Frequency scanning is a powerful and versatile approach for Sub-Synchronous Resonance (SSR) screening in power grids. Among different numerical and analytical frequency scanning techniques, the harmonic injection method is well suited for the scan of black-box models with active elements, such as in wind farms and solar plants. The results can be u...
Article
Full-text available
Power grids have recently become more susceptible to Sub-Synchronous Control Interactions (SSCI) due to the increasing penetration of renewable resources and series-compensated lines. SSCI is a purely electrical and fast-growing phenomenon. Therefore, without an expeditious detection and mitigation solution, it can cause serious damage to renewable...
Article
The uncertainty of power system is intensified by the integration of large-scale renewable energy resources such as wind farm (WF). Considering the impact of system uncertainties, the probabilistic stability analysis methods have been used in the stability assessments of power system with the WF integration. However, in traditional probabilistic an...
Article
Electronic current transducers based on Rogowski coil are commonly used for power system protection. However, they may generate additional dynamic components in some cases that may cause misoperation of protection devices. In order to check the hidden danger of this undesired phenomenon, this paper studies the transfer characteristics of Rogowski c...
Article
Full-text available
This research describes a real-time optimization model for multi-agent demand response (DR) from a Load Serving Entity (LSE) perspective. Three major categories of customers and five types of energy resources are considered simultaneously to achieve efficient DR decision making in highly stochastic future energy markets. Two infinite horizon stocha...
Article
Full-text available
As one of the most promising renewable energy resources, a large amount of wind energy has been implemented all around the world since 1990s. Increasing the size of the wind turbines and the harsh operating environment lead to higher failure rates on the wind turbines compared with other renewable resources. As the result, not only unplanned mainte...
Article
In arc flash hazards calculations, protection boundary can be used to gain insight in personnel protection against thermal injuries. Although IEEE 1584-2002 has provided the calculation guide based on tests with the arcing electrodes in a vertical plane, applications where the traditional vertical arrangement is not directly applicable is drawing m...
Conference Paper
Full-text available
As one of the most promising renewable energy resources, a large amount of wind energy has been implemented all around the world since 1990s. Increasing the size of the wind turbines and the harsh operating environment lead to higher failure rates on the wind turbines compared with other renewable resources. As the result, not only unplanned mainte...
Article
The Internet of Things (IoT) concept allows objects to share data through wired or wireless connections for communication purposes. The Industrial Internet of Things (IIoT) is an extended concept of IoT that refers to an integration of data acquisition, communication, and processing on a real-time network. Currently, IIoT has been involved with the...
Preprint
Full-text available
Multi-terminal high voltage direct current (MTHVDC) technology is a promising technology for the offshore wind farm integration, which requires the new control and operation scheme. Therefore, the optimal power flow problem for this system is important to achieve the optimal economic operation. In this paper, convex relaxation model based on semide...